Hi its possible, but its very common for your cycles to take a long while to get back to normal. It took me 6 months to get a period (my doctors wouldn't do anything until then.) then i only had one every 6 weeks or so, i can understand how frustrating it is not being anle to track your cycle. Hopefully you wont have to wait that long!
Maybe the pink stain was the start of your period? Fingers crossed!
I found concentrating on making myself as healthy as possible and taking folic acid helped and having sex every few days meant if i did ovulate i wouldn't really miss the window. Good luck! Xx